A note on the triple difference in economic models |
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| Authors: | Peter Berck |
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| Institution: | Department of Agricultural and Resource Economics, University of California, Berkeley, CA, USA |
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| Abstract: | This article shows when a triple difference strategy using an imperfect control category improves on the double difference strategy for estimating an average treatment effect. For example, a product is treated in one place and not another leading to a double difference strategy. When does comparison with an untreated product in triple difference strategy improve accuracy? |
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| Keywords: | Difference in difference triple difference policy evaluation average treatment effect |
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